Comparison of Panasonic 70-200mm f/4 OIS Lumix S Pro (S-R70200) and Tamron 70-210mm f/4 Di VC USD (Model A034)

Attribute	Panasonic 70-200mm f/4 OIS Lumix S Pro (S-R70200) ×	Tamron 70-210mm f/4 Di VC USD (Model A034) ×
Aperture (f)	4.00 - 22.00	4.00 - 32.00
Filter Size (mm)	77	67
Notes	O.I.S. Image Stabilization (Dual I.S. 2 compatible); Dust/splash-resistant	Moisture-Resistant Construction; Image Stabilized (CIPA rated to 4-stops); Available mounts: Canon EF, Nikon F
Closest Focus (m)	0.92	0.95
Magnification Ratio (x)	0.25	0.32
Zoom System	Rotary	Rotary
Type	Telephoto Zoom	Telephoto Zoom
APS Equivalent	105 - 300mm	1.5x: 105 - 315mm; 1.6x: 112 - 336mm
Diaphragm Blades	9	9
Image Circle	35mm (L-Mount)	35mm
Focal Length (mm)	70.00 - 200.00	70.00 - 210.00
Brand	Panasonic	Tamron
Name	Panasonic 70-200mm f/4 OIS Lumix S Pro (S-R70200)	Tamron 70-210mm f/4 Di VC USD (Model A034)
Weight (g)	985	859
Diaphragm Blades Type	circular	rounded
Lens Construction	23 elements in 17 groups, including 1 aspherical, 1 UED, 1 UHR and 3 ED elements; Fluorine coating on front element.	20 elements in 14 groups, including 3 LD (Low Dispersion) elements; Fluorine Coating
Diagonal Angle of View (degree)	12.00 - 34.00	11.80 - 34.30
Length (mm)	179	175
Diameter (mm)	84.4	76
Focus Details	Internal AF with linear motor; AF/MF clutch mechanism	Internal using USD (Ultrasonic Silent Drive) motor with continuous manual focus override; AF/MF switch